Which one of the following alkali metals is the weakest reducing agent as per their $\mathrm{E}^{\circ}$…
Which one of the following alkali metals is the weakest reducing agent as per their $\mathrm{E}^{\circ}$ values?
K
Cs
Li
Na
Solution
Standard electrode potential
\begin{array}{ll} & \mathbf{E}^{\circ} (in volts) \\\mathrm{Li}^{+} / \mathrm{Li} & -3.05 \\\mathrm{Na}^{+} / \mathrm{Na} & -2.71 \\\mathrm{~K}^{+} / \mathrm{K} & -2.93 \\\mathrm{Rb}^{+} / \mathrm{Rb} & -2.92 \\\mathrm{Cs}^{+} / \mathrm{Cs} & -2.92\end{array}
Lithium has the most negative standard potential while sodium has the lowest negative standard potential.